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a bromine ion will have 36 electrons and a -1 charge
Elements do NOT have any charge. Cu(65) has 29 protons with 36 neutrons, the same is in the '+1' ION of this element (Cu+1) which then has 1 electron less than the elemental form(29 electrons), thus 28 electrons. Important to know: IONS (with charge) are not ELEMENTS !
An ion with missing electrons, and thus a positive charge, is a cation.
A cation is an ion which has less electrons than protons, therefore it has a net positive charge. The atom (or molecule) has given up 1 or more electrons to form the ion. An ion which has gained 1 or more electrons (and therefore has net negative charge) is called an anion.
17
a bromine ion will have 36 electrons and a -1 charge
35
If the ion is positive, then the loss of an electron will result in the ion having one greater positive charge. (A +3 ion will be +4.) If the ion is negative, then the loss of an electron will result in the ion being one less negative than it was previously. (A -4 ion wil be -3. A -1 ion will be neutral and have a zero charge.)
because chlorine has 17 protons contributing to a +17 charge, 18 electrons have a -18 charge, 17-18 = -1 which is the overall charge of the ion
It has 3 more protons than electrons. Protons are 1+ and electrons are 1-. So the charge on the hypothetical ion would be 3+
A neutral atom has an equal number of protons and electrons. Protons are positively charged, and electrons are negatively charged. Therefore if you have an ion with a -1 charge, it has one extra electron. So your ion has 85 protons.
Elements do NOT have any charge. Cu(65) has 29 protons with 36 neutrons, the same is in the '+1' ION of this element (Cu+1) which then has 1 electron less than the elemental form(29 electrons), thus 28 electrons. Important to know: IONS (with charge) are not ELEMENTS !
It has 7 valence electrons.
-1
An ion with missing electrons, and thus a positive charge, is a cation.
A charge which is not a positive charge is a negative charge.
Electrons have a -1 charge while protons have a +1 charge. Thus, subtracting the number of electrons from the number of protons gives the charge of a species. For example, if a lithium ion has 3 protons and 2 electrons, it has a +1 charge.